Download App

Semiconductor Electronic: Material, Devices And Simple Circuits — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsSemiconductor Electronic: Material, Devices And Simple Circuits1 Mark
MCQ
In a transistor:
  • A
    The emitter has the least concentration of impurity.
  • B
    The collector has the least concentration of impurity.
  • ✓
    The base has the least concentration of impurity.
  • D
    All the three regions have equal concentrations of impurity.
✓

Answer

Correct option: C.
The base has the least concentration of impurity.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from Semiconductor Electronic: Material, Devices And Simple Circuits→Semiconductor Electronic: Material, Devices And Simple Circuits — all question types→Physics STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

Coulomb's Law agrees with $........$?
→
A person has been using spectacles of power- $1.0$ diopter for distant vision and a separate reading glass of power $2.0$ diopters. What is the least distance of distinct vision for this person $.......cm$
→
The intensity of light from a continuously emitting laser source operating at $638 \,nm$ wavelength is modulated at $1 \,GHz$. The modulation is done by momentarily cutting the intensity off with a frequency of $1 \,GHz$. What is the farthest distance apart two detectors can be placed in the line of the laser light, so that they can see the portions of the same pulse simultaneously?

(Consider the speed of light in air $3 \times 10^{8} \,m / s$ )

→
An astronomical telescope has a magnifying power $10.$ The focal length of eyepiece is $20 \,cm$. The focal length of objective is.....$cm$
→
An electron moves in a circular orbit with a uniform speed $v$. It produces a magnetic field $B$ at the centre of the circle. The radius of the circle is proportional to
→
When the number of turns in a solenoid are doubled without any change in the length of the solenoid, its self inductance becomes
→
In Young's double slit experiment, if one of the slit is closed fully, then in the interference pattern
→
A thin prism $P_1$ with an angle $6^{\circ}$ and made of glass of refractive index $1.54$ is combined with another prism $P _2$ made from glass of refractive index $1.72$ to produce dispersion without average deviation. The angle of prism $P_2$ is $........{}^{\circ}$
→
Light considering of wavelengths $6000\,\mathop A\limits^o $ and $5500\,\mathop A\limits^o $ falls on the double slits in $YDSE$ . $n^{th}$ order bright fringe of $\lambda = 6000\,\mathop A\limits^o $  is found to coincide with the $m^{th}$ order bright fringe of $\lambda = 5500\,\mathop A\limits^o $ . Smallest values of $n$ and $m$ are respectively
→
In a compound microscope, if the objective produces an image $I_o$ and the eye piece produces an image $I_e$, then
→